Q. “Rab” But­ler, Churchill’s Min­is­ter of Edu­ca­tion (1941-45) and Chan­cel­lor of the Exche­quer (1951-55), recalled that Churchill once told him he was doing less for the war effort than Churchill’s grey cat Nel­son, who saved fuel and pow­er by act­ing as a Prime Min­is­te­r­i­al hot-water bot­tle. True?